Not sure if it's new with the new firmware, but anyone else experienced heavy underexpose with the 1d X and the 135 L?

Nope - just tried it (v1.1.1 firmware), exposures with the 135L are perfect, both wide open and stopped down, indoors and outside.

Hmm, strange..have you downloaded a correction profile for it? Just a thought that heavy vignetting covered the background. But I tried a bunch of different. Subjects, and it's the first time I needed EC, and 2 stops! And my camera is already set to +5/8 as 0 ev..

What was wrong with the former system???Black focuspoints are much less usable then red ones in certain conditions. And that is what it's all about.If a new system is developed, make sure it is a better one, at least as userfriendly as the former one.

I think the point is versatility. With the etched screen, all the points are there, all the time (and 61 densely packed points is a lot!). With the transmissive LCD, you can choose to display only the active point(s), there's an easy visual indicator of regular vs. spot AF vs. expansion, you have an on-demand viewfinder grid as opposed to needing to swap a focus screen, you can have the electronic level displayed in the VF, etc.

IMO, there are big advantages to the LCD.

You've got some good points and I do use some of them. I'am not familiair with all the technical details I have to admit. But still, the blinking is very distracting and I have never liked disco. I turned it off already, it drives me a bit crazy. I would like to see some more information about when the lightning meter is fooled and how big is the impact. Canon should give us the option to be red all the time, the blinking option or to turn it off. I mostly shoot in daylight condition and I suppose there will be no effect during these circumstances. In this way it's not nice to use.

@ Viggo - No, I haven't downloaded any lens profiles (and I have PIC turned off, too). The vignetting is there wide open, but the exposure is fine.

I downloaded the correction profile, and it works, but the 135 measures darker consistently compared to the 85 and 50 framed pretty equal and under the same exact light on a pure white door. the 50 and 85 chooses the same settings, whilst the 135 gives me a faster shutter. (1/200 for the 85 gives 1/250s with the 135, 1/125s vs 1/160s etc.) outside it looks like I'm using spot metering on a bright subject against a dark background.

Help,needed please I’ve just downloaded the new firmware version 1.1.1 & the auto focus point is still black in AI Servo? But still flashes red in one shot. Any ideas.I have re downloaded the firmware twice & reinstalled it 4 times & it’s still the same not lighting up red in AI Servo.

Help,needed please I’ve just downloaded the new firmware version 1.1.1 & the auto focus point is still black in AI Servo? But still flashes red in one shot. Any ideas.I have re downloaded the firmware twice & reinstalled it 4 times & it’s still the same not lighting up red in AI Servo.

Erm...did you turn it on in the settings? AI Servo point illumination is off by default.

Help,needed please I’ve just downloaded the new firmware version 1.1.1 & the auto focus point is still black in AI Servo? But still flashes red in one shot. Any ideas.I have re downloaded the firmware twice & reinstalled it 4 times & it’s still the same not lighting up red in AI Servo.

Erm...did you turn it on in the settings? AI Servo point illumination is off by default.

Yes its was turned on, I think I’ve now sorted it AF menu5, option No 2, I’ve selected the first option (Selected constant) & it now seems to be working, continually flashing. But I’m not 100% convinced that this was the problem as I’ve now set it back to all constant as I think that where it was before & it now works ok there? Strange.

NB if I select option 3 (selected pre-AF focused) or 4 (selected focused) then the AF point flashes once & then disappears. Is this correct?

AF5 menu option 3, VF display illumination, press set, then Q, then set it to Illuminated. But yes, I have menu item 2 set to selected/constant, but it flashes in servo with other settings there (pre focus, etc.,) except off.

Actually, with display during focus set to off but servo illumination on, the red light flashes anyway, but no points are illuminated. That seems wrong, although that may be intentional, Canon might think we want the grid display to flash or something...

AF5 menu option 3, VF display illumination, press set, then Q, then set it to Illuminated. But yes, I have menu item 2 set to selected/constant, but it flashes in servo with other settings there (pre focus, etc.,) except off.

Actually, with display during focus set to off but servo illumination on, the red light flashes anyway, but no points are illuminated. That seems wrong, although that may be intentional, Canon might think we want the grid display to flash or something...

Thank you for your help Neuro. I did not know re the pushing the Q button gave other options, but it was already set to illuminated (normal). Maybe I set it when I originally got the camera? ( I do read the manuals quite throughly when I first get hold of a new camera, but being 66 my memory is not that good any more. (senior moments) . kind regards Chris

AF5 menu option 3, VF display illumination, press set, then Q, then set it to Illuminated. But yes, I have menu item 2 set to selected/constant, but it flashes in servo with other settings there (pre focus, etc.,) except off.

Actually, with display during focus set to off but servo illumination on, the red light flashes anyway, but no points are illuminated. That seems wrong, although that may be intentional, Canon might think we want the grid display to flash or something...

Neuro, It does seem strange to me that it was not working with my original settings, BUT it now is having reset them back just out if interest.

Thank you for your help Neuro. I did not know re the pushing the Q button gave other options, but it was already set to illuminated (normal). Maybe I set it when I originally got the camera? ( I do read the manuals quite throughly when I first get hold of a new camera, but being 66 my memory is not that good any more. (senior moments) . kind regards Chris

There is more to this blinking than is normal. My wife's IDX performs perfectly & just blinks once when focus is achieved.Mine however blinks constantly, less brightly & even when I don't have my finger on the shutter button.

Speed, (or others), any word back from Canon on the erratic/dimmed blinking of the focus points? You mentioned you sent them an email, and I am experiencing the same thing. Also, anyone else experiencing this phenomenon?

There is more to this blinking than is normal. My wife's IDX performs perfectly & just blinks once when focus is achieved.Mine however blinks constantly, less brightly & even when I don't have my finger on the shutter button.

Speed, (or others), any word back from Canon on the erratic/dimmed blinking of the focus points? You mentioned you sent them an email, and I am experiencing the same thing. Also, anyone else experiencing this phenomenon?

Yes mine does that, to me whats particular annoying is that it continues to blink even when the AF-ON button is released.

There is more to this blinking than is normal. My wife's IDX performs perfectly & just blinks once when focus is achieved.Mine however blinks constantly, less brightly & even when I don't have my finger on the shutter button.

Speed, (or others), any word back from Canon on the erratic/dimmed blinking of the focus points? You mentioned you sent them an email, and I am experiencing the same thing. Also, anyone else experiencing this phenomenon?

Yes mine does that, to me whats particular annoying is that it continues to blink even when the AF-ON button is released.

Yep. Mine too. It's so annoying that I turned it off. But I would prefer to be able to use the feature when it's very dark.